//*****************************************************************************
//   +--+       
//   | ++----+   
//   +-++    |  
//     |     |  
//   +-+--+  |   
//   | +--+--+  
//   +----+    Copyright (c) 2009-10 Code Red Technologies Ltd.
//
// Microcontroller Startup code for use with Red Suite
//
// Software License Agreement
// 
// The software is owned by Code Red Technologies and/or its suppliers, and is 
// protected under applicable copyright laws.  All rights are reserved.  Any 
// use in violation of the foregoing restrictions may subject the user to criminal 
// sanctions under applicable laws, as well as to civil liability for the breach 
// of the terms and conditions of this license.
// 
// THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED
// OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
// USE OF THIS SOFTWARE FOR COMMERCIAL DEVELOPMENT AND/OR EDUCATION IS SUBJECT
// TO A CURRENT END USER LICENSE AGREEMENT (COMMERCIAL OR EDUCATIONAL) WITH
// CODE RED TECHNOLOGIES LTD. 
//
//*****************************************************************************
#if defined (__cplusplus)
#ifdef __REDLIB__
#error Redlib does not support C++
#else
//*****************************************************************************
//
// The entry point for the C++ library startup
//
//*****************************************************************************
extern "C" {
	extern void __libc_init_array(void);
}
#endif
#endif

#define WEAK __attribute__ ((weak))
#define ALIAS(f) __attribute__ ((weak, alias (#f)))

// Code Red - if CMSIS is being used, then SystemInit() routine
// will be called by startup code rather than in application's main()
#if defined (__USE_CMSIS)
#include "system_LPC13xx.h"
#endif

//*****************************************************************************
#if defined (__cplusplus)
extern "C" {
#endif

//*****************************************************************************
//
// Forward declaration of the default handlers. These are aliased.
// When the application defines a handler (with the same name), this will 
// automatically take precedence over these weak definitions
//
//*****************************************************************************
void ResetISR(void);
WEAK void NMI_Handler(void);
WEAK void HardFault_Handler(void);
WEAK void MemManage_Handler(void);
WEAK void BusFault_Handler(void);
WEAK void UsageFault_Handler(void);
WEAK void SVCall_Handler(void);
WEAK void DebugMon_Handler(void);
WEAK void PendSV_Handler(void);
WEAK void SysTick_Handler(void);
WEAK void IntDefaultHandler(void);
//*****************************************************************************
//
// Forward declaration of the specific IRQ handlers. These are aliased
// to the IntDefaultHandler, which is a 'forever' loop. When the application
// defines a handler (with the same name), this will automatically take 
// precedence over these weak definitions
//
//*****************************************************************************

void I2C_IRQHandler(void) ALIAS(IntDefaultHandler);
void TIMER16_0_IRQHandler(void) ALIAS(IntDefaultHandler);
void TIMER16_1_IRQHandler(void) ALIAS(IntDefaultHandler);
void TIMER32_0_IRQHandler(void) ALIAS(IntDefaultHandler);
void TIMER32_1_IRQHandler(void) ALIAS(IntDefaultHandler);
void SSP_IRQHandler(void) ALIAS(IntDefaultHandler);
void UART_IRQHandler(void) ALIAS(IntDefaultHandler);
void USB_IRQHandler(void) ALIAS(IntDefaultHandler);
void USB_FIQHandler(void) ALIAS(IntDefaultHandler);
void ADC_IRQHandler(void) ALIAS(IntDefaultHandler);
void WDT_IRQHandler(void) ALIAS(IntDefaultHandler);
void BOD_IRQHandler(void) ALIAS(IntDefaultHandler);
void FMC_IRQHandler(void) ALIAS(IntDefaultHandler);
void PIOINT3_IRQHandler(void) ALIAS(IntDefaultHandler);
void PIOINT2_IRQHandler(void) ALIAS(IntDefaultHandler);
void PIOINT1_IRQHandler(void) ALIAS(IntDefaultHandler);
void PIOINT0_IRQHandler(void) ALIAS(IntDefaultHandler);
void WAKEUP_IRQHandler(void) ALIAS(IntDefaultHandler);

//*****************************************************************************
//
// The entry point for the application.
// __main() is the entry point for Redlib based applications
// main() is the entry point for Newlib based applications
//
//*****************************************************************************
#if defined (__REDLIB__)
extern void __main(void);
#endif
extern int main(void);
//*****************************************************************************
//
// External declaration for the pointer to the stack top from the Linker Script
//
//*****************************************************************************
extern void _vStackTop(void);

//*****************************************************************************
#if defined (__cplusplus)
} // extern "C"
#endif
//*****************************************************************************
//
// The vector table.  Note that the proper constructs must be placed on this to
// ensure that it ends up at physical address 0x0000.0000.
//
//*****************************************************************************
extern void (* const g_pfnVectors[])(void);
__attribute__ ((section(".isr_vector")))
void (* const g_pfnVectors[])(void) = {
	// Core Level - CM3
		&_vStackTop, // The initial stack pointer
		ResetISR, // The reset handler
		NMI_Handler, // The NMI handler
		HardFault_Handler, // The hard fault handler
		MemManage_Handler, // The MPU fault handler
		BusFault_Handler, // The bus fault handler
		UsageFault_Handler, // The usage fault handler
		0, // Reserved
		0, // Reserved
		0, // Reserved
		0, // Reserved
		SVCall_Handler, // SVCall handler
		DebugMon_Handler, // Debug monitor handler
		0, // Reserved
		PendSV_Handler, // The PendSV handler
		SysTick_Handler, // The SysTick handler


		// Wakeup sources (40 ea.) for the I/O pins:
		//   PIO0 (0:11)
		//   PIO1 (0:11)
		//   PIO2 (0:11)
		//   PIO3 (0:3)
		WAKEUP_IRQHandler, // PIO0_0  Wakeup
		WAKEUP_IRQHandler, // PIO0_1  Wakeup
		WAKEUP_IRQHandler, // PIO0_2  Wakeup
		WAKEUP_IRQHandler, // PIO0_3  Wakeup
		WAKEUP_IRQHandler, // PIO0_4  Wakeup
		WAKEUP_IRQHandler, // PIO0_5  Wakeup
		WAKEUP_IRQHandler, // PIO0_6  Wakeup
		WAKEUP_IRQHandler, // PIO0_7  Wakeup
		WAKEUP_IRQHandler, // PIO0_8  Wakeup
		WAKEUP_IRQHandler, // PIO0_9  Wakeup
		WAKEUP_IRQHandler, // PIO0_10 Wakeup
		WAKEUP_IRQHandler, // PIO0_11 Wakeup

		WAKEUP_IRQHandler, // PIO1_0  Wakeup
		WAKEUP_IRQHandler, // PIO1_1  Wakeup
		WAKEUP_IRQHandler, // PIO1_2  Wakeup
		WAKEUP_IRQHandler, // PIO1_3  Wakeup
		WAKEUP_IRQHandler, // PIO1_4  Wakeup
		WAKEUP_IRQHandler, // PIO1_5  Wakeup
		WAKEUP_IRQHandler, // PIO1_6  Wakeup
		WAKEUP_IRQHandler, // PIO1_7  Wakeup
		WAKEUP_IRQHandler, // PIO1_8  Wakeup
		WAKEUP_IRQHandler, // PIO1_9  Wakeup
		WAKEUP_IRQHandler, // PIO1_10 Wakeup
		WAKEUP_IRQHandler, // PIO1_11 Wakeup

		WAKEUP_IRQHandler, // PIO2_0  Wakeup
		WAKEUP_IRQHandler, // PIO2_1  Wakeup
		WAKEUP_IRQHandler, // PIO2_2  Wakeup
		WAKEUP_IRQHandler, // PIO2_3  Wakeup
		WAKEUP_IRQHandler, // PIO2_4  Wakeup
		WAKEUP_IRQHandler, // PIO2_5  Wakeup
		WAKEUP_IRQHandler, // PIO2_6  Wakeup
		WAKEUP_IRQHandler, // PIO2_7  Wakeup
		WAKEUP_IRQHandler, // PIO2_8  Wakeup
		WAKEUP_IRQHandler, // PIO2_9  Wakeup
		WAKEUP_IRQHandler, // PIO2_10 Wakeup
		WAKEUP_IRQHandler, // PIO2_11 Wakeup

		WAKEUP_IRQHandler, // PIO3_0  Wakeup
		WAKEUP_IRQHandler, // PIO3_1  Wakeup
		WAKEUP_IRQHandler, // PIO3_2  Wakeup
		WAKEUP_IRQHandler, // PIO3_3  Wakeup

		I2C_IRQHandler, // I2C0
		TIMER16_0_IRQHandler, // CT16B0 (16-bit Timer 0)
		TIMER16_1_IRQHandler, // CT16B1 (16-bit Timer 1)
		TIMER32_0_IRQHandler, // CT32B0 (32-bit Timer 0)
		TIMER32_1_IRQHandler, // CT32B1 (32-bit Timer 1)
		SSP_IRQHandler, // SSP0
		UART_IRQHandler, // UART0

		USB_IRQHandler, // USB IRQ
		USB_FIQHandler, // USB FIQ

		ADC_IRQHandler, // ADC   (A/D Converter)
		WDT_IRQHandler, // WDT   (Watchdog Timer)
		BOD_IRQHandler, // BOD   (Brownout Detect)
		FMC_IRQHandler, // Flash (IP2111 Flash Memory Controller)
		PIOINT3_IRQHandler, // PIO INT3
		PIOINT2_IRQHandler, // PIO INT2
		PIOINT1_IRQHandler, // PIO INT1
		PIOINT0_IRQHandler, // PIO INT0

	};

//*****************************************************************************
//
// The following are constructs created by the linker, indicating where the
// the "data" and "bss" segments reside in memory.  The initializers for the
// for the "data" segment resides immediately following the "text" segment.
//
//*****************************************************************************
extern unsigned long _etext;
extern unsigned long _data;
extern unsigned long _edata;
extern unsigned long _bss;
extern unsigned long _ebss;

//*****************************************************************************
//
// This is the code that gets called when the processor first starts execution
// following a reset event.  Only the absolutely necessary set is performed,
// after which the application supplied entry() routine is called.  Any fancy
// actions (such as making decisions based on the reset cause register, and
// resetting the bits in that register) are left solely in the hands of the
// application.
//
//*****************************************************************************
void
ResetISR(void) {
	unsigned long *pulSrc, *pulDest;

	//
	// Copy the data segment initializers from flash to SRAM.
	//
	pulSrc = &_etext;
	for (pulDest = &_data; pulDest < &_edata;) {
		*pulDest++ = *pulSrc++;
	}

	//
	// Zero fill the bss segment.  This is done with inline assembly since this
	// will clear the value of pulDest if it is not kept in a register.
	//
	__asm("    ldr     r0, =_bss\n"
			"    ldr     r1, =_ebss\n"
			"    mov     r2, #0\n"
			"    .thumb_func\n"
			"zero_loop:\n"
			"        cmp     r0, r1\n"
			"        it      lt\n"
			"        strlt   r2, [r0], #4\n"
			"        blt     zero_loop");

#ifdef __USE_CMSIS
	SystemInit();
#endif

#if defined (__cplusplus)
	//
	// Call C++ library initialisation
	//
	__libc_init_array();
#endif

#if defined (__REDLIB__)
	// Call the Redlib library, which in turn calls main()
	__main() ;
#else
	main();
#endif
	//
	// main() shouldn't return, but if it does, we'll just enter an infinite loop 
	//
	while (1) {
		;
	}
}

//*****************************************************************************
//
// This is the code that gets called when the processor receives a NMI.  This
// simply enters an infinite loop, preserving the system state for examination
// by a debugger.
//
//*****************************************************************************
void NMI_Handler(void) {
	while (1) {
	}
}

void HardFault_Handler(void) {
	while (1) {
	}
}

void MemManage_Handler(void) {
	while (1) {
	}
}

void BusFault_Handler(void) {
	while (1) {
	}
}

void UsageFault_Handler(void) {
	while (1) {
	}
}

void SVCall_Handler(void) {
	while (1) {
	}
}

void DebugMon_Handler(void) {
	while (1) {
	}
}

void PendSV_Handler(void) {
	while (1) {
	}
}

void SysTick_Handler(void) {
	while (1) {
	}
}

//*****************************************************************************
//
// Processor ends up here if an unexpected interrupt occurs or a handler
// is not present in the application code.
//
//*****************************************************************************

void IntDefaultHandler(void) {
	//
	// Go into an infinite loop.
	//
	while (1) {
	}
}
